Sugar roll mill



VOct. 13, 1931. c. J. FENDER SUGAR ROLL MILL Filed Feb. 25, 1929 /Nv @Nvarg vPatented ct. 1.3', 1931V UNITED STATES CULIBERT JAMES PENDERy-"OF LAU'IOKA, FIJI SUGAR BOLL MILL Application med February 25, 1929, serial No. 342,543,21111 in Australia March s, 192s.

The throughput of shredded cane or megass in roller mills in sugar factories is limited by the inability of the rolls to take in megass at the rate at which they are capable of crush- 5 ing it. The megass tends to crowd at the nip of the front and top rollers. The bulk of the feed is taken by the mill, but the failure of the front and top rollers to take a full nip accounts for a loss in possible throughput which may be estimated at up to 20%.

To augment the intake of feed, sugar mills have been fitted with reciprocating pusher feeders which operate under the feed chute in a horizontal direction to vforce the megass i into the nip of the front and top rollers, but

these pushers have provided only a partial remedy for the defect.

The present invention consists in a pusher operating in a vertical direction in co-action with the known pusher equipment which operates in a nearly horizontal direction to compact the feed and enforce the intake of a full feed by the front and top rollers of each mill. The new pusher operates forwardly of the feed plate and in a vertical path or in a path inclined from the vertical, alternating its movements with the movements of the pusher which operates belowr the feed plate.

Whilst the pusher operating under the feed plate forces the feed towards the nip of the rollers, the vertical pusher packs it down on top of the front roller, thus preventing crowding of the feed and packing up against the front aspect of the top roller.

The vertically disposed pusher is preferably hollow, open at the ends and perforated on bottom and sides. Some of the juice which isexpressed in the pushing action wells up and passes into the cavity in the pusher throughr the perforations and flows out through the open ends of the pusher, thence flowing down into the juice pan below the rolls. v

Both pushers are driven from eccentrics or cranks on a jack shaft or they may be driven direct from an engine or motor or any other convenient source of motion. The drive is applied through linkage and cranks or otherwise, so arranged as to obtain the,

alternated movement and appropriate guides are fitted toy maintain the vertical pusher in the designed operative relation to the lower pusher and the front and top rollers. It is practicable'to so arrange the pusher drives thatboth pushers thrust towards the rollers simultaneously but the alternate movement arrangement is preferred.

In the accompanying drawing Fig. l is a longitudinal vertical section through the fore part of a three-roller mill to which the invention is applied; and

v F ig. 2 is a fragl'nentary section through the vertical pusher showing the perforations for the intake of the juice during the downward stroke. l

'A is the megass feed chute through which the megass passes to the mill, B is the deadv plate, C the-top roller, D the front roller, and E the inwardly acting (horizontal or inclined) pusher which forms part of existing mill equipments.' F is a shaft, G a crank thereon, H a spring buffer connecting rod, and J an arm on a jack shaft K takin reciprocating motion from the crank through the connecting rod H. L is another arm on the oscillating jack shaft K, and M a link connecting the arm L of the pusher E.

The novel additional feature in the equipment is the vertical pusher N which operates in a vertical or nearly vertical direction in co-operation with the pusher E. O are guides for the pusher N, P an oscillating arm which drives the pusher N through a link Q, R a jack shaft on which the arm P is keyed, S another arm keyed on the jack shaft R, and T a spring buffer connecting rod between the arm S and a crank U on the shaft F.

The crank throws G and U are set so that the pushers E and N operate alternatel that is to say the forward movement of takes place during the retiring movement of N and vice versa but this arrangement might be varied to cause both pushers to move forwardly at the same time, or to cause one of them to act more or less later than the other one.

Megass which is pushed towards the rollers by the pusher E tends to crowd up 2u" f y 8:21665 against the vfront of the top` roller. rll`his crowded megass is pushed down by the pusher N, VThe result of the co-action of the ltwo pushers'is to ensure largerv feed of i l5 inegass into theiill, and consequently to obtains throughput up to thefull capacity of the lmill .to :handlefthe feed. Y

YIn the Vdownstroke 'of the pusherqNfthe A megass sui'ers compression so that more or' s w less juces squeezed out of it. To'ifecilita'teY eduction of this extracted juice, thefwertical. i

pusher is preferably hollow'. A convenient structural section is shown in Fig. i2 Where? Y the shoe of the rpusher is formed voi ay clian-L 15 nel W with 'cheek pl'altes'X'W'elded'orf other- Wise iXedyto @it thus toproyide a 4hollow v centre cavity Y, Zkfare holes .drilled through the shoe Wand-the cheeks Y:liixtracted juice Viioods through the holesZ intothe gay# 2G ity Y .and flows fout v4of the openends ,ofthe structure, whence itsdrops .finto V-thevjuice pand v What I claim asjrny s invention f and 4desire to secureby Letters Patentiss l. 4A feedpusher forfsugar mills .adapted Y 25 to act onamaterialentering theexpressing rollers in'cludingza 'reciprocable body rof hol- 10W formihaving Vperforations therein toV ad- Init`extrectedrjupice. Y v f e y2. A feed-ypushenfor sugar millsv Ladapted 3@ to act on material entering the- \eXrpressingV rollers @including :afre'ciprocable body-of holl --lowform hsvingperforationsthereinjto admity extracted-juice, saidbody having terminal peIOratiQns permitting .the discharge of si? extracted'juicefrom-thefpushenA Y. A `v'fpilnftestiinonywhereofI aH-Xgmyfsignaturefl f ,i GULBERTJAMEs FENDER.; 

